| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | he could [verb] | 7789 |
|
| 2 | he could [vb infin] | 7719 |
|
| 3 | [pron] could understand | 167 |
|
| 4 | he [modal v] understand | 96 |
|
| 5 | he [vb mod] understand | 96 |
|
| 6 | he could understand | 32 |
|
| 7 | he could understand | 32 |
|
